Main Engine 4-Stroke · Main Engines (4-Stroke)
The marine diesel engines belong to the category of heavy-duty power generators. The Caterpillar MaK 6L M552C is a legacy model, produced in the late 1980s and still operational today due to its robust design. This engine features a bore of 450 mm and a stroke of 550 mm (M551) or 520 mm (M552), capable of delivering up to 835 bhp at 500 rpm with heavy fuel oil as the primary fuel source. Common issues include valve guide wear, piston crown erosion from incorrect injection timing, turbocharger bearing wear due to lubrication management challenges, and connecting rod clearance drift in its long-stroke design. Regular inspections focusing on these areas are crucial for maintaining optimal performance.
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